Harrow



(NoaModel.)

o. A. BRosTRoM.

HARROW.

Patented Dec. 18,v 1883. Y

1 WITNESSES j? O www@ Attorney CHARLES A. BROSTROM, OF ROCK ISLAND, ILLIOIS.

HARROW.

SPECIFICATION forming part of Letters Patent No. 290,525, dated December 18, 1883. Application ilcd'Otobcr ji, 1383. (No modell .To a/ZZ whom it may concern:

Be it known that I, CHARLES A. Bnosrnon, a citizen of the United States, residing at Rock Island, in the county of Rock Island and State of Illinois, have invented certain new and useful Impro vementsin Barrows; and I do hereby declare that the following is a full, clear, and exact description of the samereference being had to the annexed drawings, making a part of this specication, and to the letters and figures of reference marked thereon.V

Figure l of the dran-'ings is a perspective view of my invention Fig. 2, a detail perspective view of a portion of a tooth-beam and tooth secured thereto; Fig. 8, a similar view of one of the teeth and its locking-pin, Fig. 4, a longitudinal section through the head of one of the teethfand Fig. 5 a similar view of one ofthe cross-braces.

rlhis invention relates to certain :newy and useful improvements in that class of harrows' provided with pivotal teeth having their up per ends bentat right angles to the body por* tion thereof, and has for its object to improve the construction of this class of devices, so as to do away with the use of Wood commonly employed for the tooth-beams, and at the same time provide a strong, light, and durable harrow.

A further object of the invention is to construct the toothbeams and teeth of the harrow in such a manner that said teeth may be pivotally connected to the beams and have a play that will admit of the device being used eitheras a sharp or smooth harrmv, according to which end the draft may be applied; also, by having the teeth connected di.- rectly to the sides of the beams, their liability to break off when coming in contact with unusual obstructions is obviated, this breaking off being a great objection to harrows of the ordinary construction, Where the teeth are fastened to or through the bottom of the beams.

Another object ofthe invention is to do away with the use of staples or similar devices commonly used. to hold the teeth in place while allowing them play, such means having been found objectionable, owing to their liability to bend or break off bythe strain brought thereon. These objects I attain by the. construction substantially as shown in the accompanying drawings, and hereinafter more fully described.

In the drawings, A Areprcsent two sections of a harroxv constructed according to my invention, said secti ons being united by a strap, B, having its ends formed with open links c, which engage eyes b, at the inner end of crossbraces C, said cross-braces being preferably composed of asuitable rod, k, passing through perforations in the beams D, and suitable staypieces, Z, interposed between said beams. The

rods, also passing through these stay-pieces,

are screw-threaded upon their outer ends, so that the sections may be tightened up by suitable bolts, as shown in Fig, 5. The beams D are made, preferably of steel, in the form of an angle or L shape, their sides being perfoi-ated at suitable distances apart to receive the heads of the teeth, and their bases are .provided With angular slots i, relative in number to the perforations c in the sides, these slots being for the purpose of giving play to the teeth, so that the harrovvmay be converted from a sharp to a smooth one, as may be found necessary or convenient, by simply reversing thedraft, suitable perforated plates, c, being connected to the beams I) at both ends of the sections, in such a manner that the double-tree E can be adj ustably attached thereto, and the draftcome upon the outer side of one and the inner side of the other of said sections.

The teeth F of my improved harroW have their upper ends made at right angles to the body, so as to form heads d, which fit the perforations c in the sides of the angular beams D, These heads of the teeth have sun ktherein upon one side While hot a slot or cavity, f, the end thereof nearest the depending or body portion of each tooth being depressed at right angles to form asoclret, g, for the right-angular portion g of a `wrought-metal pin, Ii, adapted to fit in said slot or cavity. To fasten the teeth to the L- shaped beams, the Wrought metal pins are placed in the slot or cavity in the head of each individual tooth. The body portion of said tooth is placed in one of the angular slot-s in the base of the beam, with the head parallel to the side thereof. After this adjustment, the tooth is turned so that its head and pin will pass through the perforation in the side of the beam arranged relatively with the angular slot in its base in which this particular tooth may be inserted. The end of the Wroughtmetal pin is nonT hammered over against the IOO side of the beam, as shown in dotted lines, Fig. 2, and thereby holds the tooth rmly in place, it being impossible for it`to become disnected, though it has a pivotal movement, as the Wrought-metal pin only lls out the circumference of its head, the diameter of which is about equal to that of the perforation in which it is fitted.

Having now fully described my invention, what I claim as neW,' and desire to secure by Letters Patent, is-

l. A harroW-tooth constructed, substantially as described, With its upper end bent at right angles to its body portion, said bent end having a longitudinal slot or cavity, which terminates in a socket or depression adapted to receive the bent end of a fastening-pin, as set forth.

2. An angularor L-shaped tooth-beam for harrows, having its side provided with perforations and its base with angular slots, substantially as and for the purpose specified.

3. A harroW-tooth having its upper end at l right angles to its body, to form a head, and provided with a slot or cavity adapted to receive a Wrought-metal pin, in combination with an angular or L-shaped tooth-beam having its sides formed with perforations and its base With angle-slots, substantially as and for the -purpose described.

4. The combination, With an angular toothbeam for harrows, having perforations in its sides and angular slots in its base, of a series of harroW-teeth formed with angular heads, each having a slot and socket at right angles to each other, and a fastening-pin adapted to iit therein as a means for securing the teeth to the beam, substantially as and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two Witnesses.

CHARLES A., BROSTROM. Vvvitnesses:

VILL. J. VHITEHEAD, OLIvER OLsEN. 

